Tank and spray gun



Jan. 3, 1950 Filed July 10, 1946 A. R. LOFSITRAND, JR 2,493,677

TANK AND SPRAY GUN 2 Sheets-Sheet 1 fia/kz'rand, w

Jan. 3 19 50 A. R. LOFSTRAND, JR 3,

TANK AND SPRAY GUN Filed July 10, 1946 2 Sheets-Sheet 2 Patented Jan. 3,1950 UNITED STATES PATENT OF F AND SBRAY Anders .Rudol'f'Lofst-raud,Jr., Silver Spring, Md.

Amflicamn J 815 10, 194 6, Serial No. 682,625

'2 Claims. 1

This invention relates to -portable rsprayers.

.An object of this invention is to provide an improved sprayer includinga portable tank, a pump for placing the material under pressure, and aspray-gun connected to the tank by a fiexiblehose.

Another object of this invention is to provide an improved insecticidetank which includes a strainer tor straining the material as .it vispoured into the tank, and :a pressure pump extending into the tank torplacing the material under the desired pressure.

A :further object of this invention is to provide in a sprayer animproved gun-type valve 400D- nected to the spray nozzle which williacilitate directing the material to the desired location.

With the above and other objects in View, my invention consists in thearrangement, combination and details of construction disclosed in thedrawings :and specification, and then more pan ticularly pointed out inthe appended claims.

In the drawings, wherein meference characters designate -similar partsthroughout the respective views,

Figure l is a detail top plan xo1 a sprayer assembly constructedaccording to an embodiment of this invention,

Figure 2 is adetail side elevation, pamtlysbmhen away and inverticalsection, of the sprazyeritank,

Figure 3 is a longitudinal section, partly broken away and in detail, ofthe spray or waive structure,

Figure .4 is .a fragmentary side elevation of the tank opposite fromthat shown iniEigune Referring (to the drawings, the numeral 2Hdesignates generally a tank structure which is formed of .a icylindricalside wall :lal, va top mall .I 2 which is upwardly bowed and tormed witha marginal upturned flange 4 3 whichmay be'welded or otherwise firmlysecured to the :side wall 13. Preterably the side Wall EH is formed with:an annular inwardly projecting head M which :forms a seat (or stopagainst which the top wall 113 :is adapted to bear. The side wall l Iextends beyond the flange ,l 3 of the top wall and the extension .of theside wall I I is reinforced by a reinforcing band 15 which may be welded.or otherwise secured to the extended side wall.

A reinforcing lower band lb is also :seemed to the lower end of the sidewall, which as shown in Figure 2, is formed with a lower annularinwardly projecting bead 1! against which the bottom wall is adapted toengage. The bottom Wall is similar tothe top wall.

The top wall l'2 has mounted thereon a 'cyl'indrical filler member l8which may be welded or 2 otherwise rfirmly secured to an inwardly turnedannular flange l9 lionmed in the top wall A2. The nipple is has threadedon the upper end thin-9 a cap 20 which is tormed with a pair of upwardlyextending lugs 21!. ilhe cap 29 on the inneriside (thereof is formedwith an inwardly projecting ,seat :22 against which a plate 23 isadapted to engage.

The plate 23 on its inner side has secumed thereto a gasket 24 issecured to ithe plate 23 by a zfastening member ,25. The plate 2.3 alsoIncludes an outwardly extending .s'tud 2-5 which extends through the cap20 andmaly be secured by means :of 1a cotter pin 52;! 01 other suitablehastentug means. The :cap :20 preferably chained to the nipple :lzBbymeans rof :an anchoring chain 2.8 which fixed :at one :end to thenipple z! 8 and at the rother send to a washer .29 interposed betweenthe fastening member 25 and the gasket 22d. The innerendrofzthe nipple23 has dependinglysecured thereto a strainer 30.

'The strainer ill] at its upper end is :formed with a flange 231engaging in :the annular groove 32 formed in the nipple l8, and a splitflocking ring 33 is adapted to :removably lock the strainer 30 on thenipple *l 8.

In order to provide a means whereby the insecticide within the tankflafl -may be placed under aiir pressure, I have provided an air pumpgenerally designated as 84. The pump 34 includes a cylinder 35 which isdisposed in depending relation within the tank H3. The upper end o'f thecylinder 35 is formed with an annular flange 36 whichengages against anannular flange 3-1 carried by a nipple 38. The nipple 38 is threadedinto -a sleeve 39 which is fixedly secured through the top Weill I 2,and a closure plate on bears against the upper side of the flange 36 "ofthe cylinder 35, being secured thereto by means of fastening nrembers4-1. lhe cylinder 35 has fixed to the inner end thereof an end wall orcap 42 which formed acentra-llydisposed boss E3. "The boss 43 hasthreaded thereintc a nipple M forming part of 'a check valve housing,and the nipple e2 has threaded on the inner end thereof a 'cap formed ofa cylindrical member 45 and an end wall 46.

The cylindrical side wall 4-5 of the check valve cap generallydesignated as M is formed with one Or more openings '48, and the endwall 46 is also formed with a central opening #9. A checkvalve plug 56'is adapted to normally engage against the inner or "lower end of thenipple 4 which constitutes a valve seat, and a plug 53! is cons'tantlyurged to closed position #by means of a spring 51. A piston generallydesignated as 52 is slidably mounted Within the cylinder 35.

The piston 52 includes a cup-shaped washer 53 which is secured by meansof a clamping ring or nut 54 to the lower end of a tubular piston rod55; Preferably a couplin member 56 is threaded onto the lower end of aplug 51 which is fixed in any suitable manner in the lower end of thetubular piston rod 55. The plug 51 is formed with a bore 58 closed bymeans of a threaded plug 59. Air is admitted to the cylinder 35 abovethe piston 52 by means of an upper air opening'60 in the tubular rod 55,and a lower openin 6I also formed in the tubular rod. Upon upward pullof the rod 55 and the piston 52, air will slip past the gasket 53 andupon downward movement of the piston the gasket 53 will slidingly andsealingly engage the cylinder 55.

The piston rod 55 has fixed to the upper end thereof a stirrup shapedhandle 62 formed with a boss 63 which is fixed about the upper end ofthe rod 55 by means of a pin 64. The handle 62 is formed with an opening65 within which a spare spraynozzle 66 is locked'by means of a screw orlocking bolt 61. The top wall of the tank has extending therefrom anoutlet hose 68 which is connected to the top wall I2 by means of acoupling 69, and the hose 68 is connected to a piston type valvestructure and spray nozzle handle as shown in Figure 3.

The handle and valve structure include a handle member formed with abore H. A coupling 12 is threaded into the lower end of the handle 10and is formed with a nipple 13 on which a coupling member 14 is threadedfor securing the outer end of the hose 68 to the handle. A tubularstrainer is carried by the coupling member 12 extending through the boreof this coupling member and into the bore H of the handle 10.

The handle 10 is also formed with a counterbore 16 communicating with avalve chamber 11 which is formed in an angularly disposed valve body orhousing generally designated as 18. The body 18 is formed with ahorizontally disposed chamber 19 communicating with the chamber 11through a reduced diameter chamber 80. The reduced diameter chamber 80forms a shoulder 8| against which a valve gasket 82 is adapted toengage. V

A spherical valve plug 83 is loosely disposed in the chamber 11 and isadapted to be normally urged to closed position by means of a spring 84carried by a hollow plug 85 which is threaded into the body 18. Theinner end of the spring 84 bears against a plate 86 having a concaveinner surface forming'a ball seat for holding the plate 86 againstlateral movement relative to the ball 83. The ball 83 is adapted to bemoved to open position by means of an elongated rod 81 which is slidablein a bushing 88 threaded into the forward endof the bore or chamber 19;The rod 81 has areduced diameter outer portion 89 forming a shoulder 90which is adapted to abut against the. inner end of the bushing 88 tolimit 7 the outward movement of the valve operating rod.

An annular flange 9I is also formed on the rod 81 and is adapted toengage against the inner end of the chamber or bore 19 in the event therod 81 is moved inwardly to the limit of the movement provided for thisrod. The rod 81 is also formed with a valve plug engaging the stem 92which is of smaller diameter than the counterbore 80 so that the fluidcan pass about the stem 92 when the valve 83 is in its openposiextension 98.

tion. A cup-shaped knob 93 is fixed on the outer end of the rod 81 andis adapted to telescope over an extension 94 carried by the bushing 88.

The chamber or bore "I9 has communicating therewith an upwardly andrearwardly inclined duct 95 whichis formed in the body 18, and the duct95 communicates at its upper or rear end with a horizontally disposedoutlet chamber or duct 96. The body '18 is formed with an upwardlyprojecting lug 91 and with a cylindrical A button locking lug 99 iscarried by a sleeve 600 which is rotatable on extension 98 and isadapted, when in released position, to be in alignment with lug 91.

When the locking lug 99 is in locked position, it is swung downwardly tothe dotted line position's'hown in Figure 3.

. An elongated pipe IOI is connected to the extension 98 by means of acoupling I02, and a spray nozzle I03 is carried by the outer end of thepipe IIJI. The spray handle and the nozzle I03 are adapted to bereleasably secured to the tank I9 by inserting the nozzle its into asocket I04 which is fixed to the side wall I I of the tank adjacent thelower end thereof. A U-shaped keeper I05, having outwardly directedflanges I06 is fixed to the upper end portion of the tank in alignmentwith the socket I05 so'that when the spray structure is not in use, thespray gun will be secured directly to the tank and the latter may becarried by means of the handle 82.

As shown in Figure 1, thehandle 62 may be locked in its innermostposition by means of oppositely directed lugs I01 which are carried bythe closure plate 48. The boss 83 has oppositely extending pins I08which are adapted to engage the lugs or keepers I01. The top wall I2 ofthe tank is also provided with a pressure gauge I09 of conventionalconstruction so that the user of this device will be able to determinethe working air pressure within the tank.

The tank I0, adjacent the bottom thereof, has extending laterallytherefrom a foot or pedal member IIO of looped construction having anupwardly directed inner end III engaging an open barrel H2 which isfixed to the lower end of the tank. In this manner the tank I9 may besteadied by placing a foot on the foot member H0 during the pumping ofair into the tank. In order to provide for carrying of the tank on theshoulder during the use of the device, I have provided a flexible strapH3 which is formed at the opposite ends thereof with snap hooks I I4,II5 engageable with eyes H6, H1 respectively, which are loosely securedto the lower and upper portions of the tank I9.

In the use and operation of this tank, the tank I0 is filled with thedesired insecticide by removing the cap 20 and discharging theinsecticide through the strainer or filler 39. Preferably the tank isnot filled to the top so that a substantial amount of air may be pumpedinto the tank by operation of the pump 34. When the desired amount ofpressure is in the tank It], the spray handle 18 may be held in one handand the pipe IOI directed to the desiredpoint. Inward pressure on thebutton or knob 93 will move the ball valve 83 to open position so thatthe insecticide may flow through the bore ll of the handle 19 and passthe valve 83 into the chamber 19. From the chamber 19, the insecticidewill flow through duct 95 into the outlet duct 96 and then pass thespray nozzle I83. If it is desired to lock the knob 93 in valve openingposition, the locking lug 99 is swung downward to the dotted lineposition shown in Figure 3.

I do not mean to confine myself to the exact details of constructionherein disclosed, but claim all variations falling within the purview ofthe appended claims.

Having thus described my invention, what I desire to claim is:

1. In a sprayer tank, an air pump projecting partly into said tank, saidpump comprising a cylinder formed with an upper flange, an internallythreaded sleeve fixed in the top wall of said tank, a nipple threadedinto said sleeve, a flange carried by the upper end of said nipple, saidcylinder flange seating on said nipple flange, a closure plate engagingon said cylinder flange, means securing said closure plate, and saidcylinder and nipple flanges together for dependingly mounting saidcylinder in said tank, an inner end wall carried by said cylinder, aninwardly opening spring-pressed check valve carried by said inner endwall, a piston slidable in said cylinder, a tubular piston rod fixed tosaid piston slidable through said closure and having an upper intakeopening, and a lower outlet opening, and a handle fixed on the upper endof said rod.

2. In a sprayer tank, an air pump projecting partly into said tank, saidpump comprising a cylinder formed with an upper flange, an internallythreaded sleeve fixed in the top wall of said tank, a nipple threadedinto said sleeve, a flange carried by the upper end of said nipple,

said cylinder flange seating on said nipple flange, a closure plateengaging on said cylinder flange, means securing said closure plate, andsaid cylinder and nipple flanges together for dependingly mounting saidcylinder in said tank, an inner end wall carried by said cylinder, aninwardly opening spring-pressed check valve carried by said inner endwall, a piston slidable in said cylinder, a tubular piston rod fixed tosaid piston slidable through said closure plate and having an upperintake opening, and a lower outlet opening, a handle fixed on the upperend of said rod, a pair of oppositely facing keepers carried by saidclosure plate, and a pair of locking lugs fixed to said handle andengageable with said keepers upon partial rotation of said handle tothereby lock said handle relative to said tank.

ANDERS RUDOLF LOFSTRAND, JR.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 604,049 Nicholsburg May 31, 18981,060,913 Lawrence May 6, 1913 1,189,932 Garber July 4, 1916 1,220,243Leitch Mar. 27, 1917 1,918,930 Phister July 18,1933 2,359,534 SlatnickOct. 3, 1944

